Informal Very unconventional or unusual: manic, off-the-wall creativity; off-the-wall humor. (adjective)
Informal Exhibiting bizarre behavior; crazy: their off-the-wall friends. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "off-the-wall" in a sentence
"Ricky Santorum, he who lost his Senate seat because of off-the-wall statements and behaviors ...."
"My new favorite web find (thanks to SuperPunch) is a Flickr gallery of CubeDudes, a collection of Lego figures that resemble (among other folks) some science fictional characters, both common and off-the-wall."
"After all, the logical games and off-the-wall situations presented by Lewis Carroll in both Alice's Adventures in Wonderland and Through the Looking Glass and What Alice Found There parallel much of the nonsense language and narrative dissociation one sometimes feels living in this first decade of the twenty-first century."